Sharpening tool



FIG. 1 is an upper perspective view of the sharpening tool showing our new design;

FIG. 2 is a front side view of the sharpening tool shown in FIG. 1;

FIG. 3 is a right side view of the sharpening tool shown in FIG. 1;

FIG. 4 is a left side view of the sharpening tool shown in FIG. 1;

FIG. 5 is a bottom view of the sharpening tool shown in FIG. 1; and,

FIG. 6 is a top view of the sharpening tool shown in FIG. 1. 

CLAIM The ornamental design for a sharpening tool, as shown and described. 